Adding-machine.



A. BORDT. ADDING MACHINE. APPLICATION FILED MAR. 25, 1909.

Patented Dec. 26, 1911.

'12 SHEETS-SHEET 1.

ADDING MACHINE."

APPLICATION FILED MAR. 25, 1909.

Patented Dec. 26, 1911.

12 SHEETS-SHEET 2.

QM. EH mi 5 as CAL Patented Dec 26, 1911.

12 SHEETS-SHEET 3.

A. BORDT. ADDING MACHINE. APPLiOATION FILED 11113.25, 1009.

1,012,976. Patented Dc. 26, 1911.

12 SHEETS-$11213! 4.

A. BORDT. ADDING 'MAQHINE.

I APPLIO ATION FILED MAR. 25. 1909. Y 1,012,976, Patented Dec.26, 1911.

Q 12 SHEETS-SHEET 6.

'APYLIOLTIOF FILED MAL-26. 1909.

Patentd B01126, 1911. 1

12 SHEETSSKEET 7.

A. BORDT ADDING moms. APPLIOATION FILED MAR. 25, 1009 v Patented Dec. 26, 1911.

12 SKEETSSHEET 8.

Patented Dec. 26, 1911.

12 SHEETS-SHEET 9- o Wank. w m

A. BORDT.

ADDING MACHINE.

APPLICATION FILED 111113.25, 1009.

o o 'o o ofo o wman l/rl/ 5 7/21! A. BORDT.

ADDING MACHINE.

APPLICATION rum) MAR. 25. 1909.

1,012,976. Patented Dec. 26, 911.

12 SHEETS-SHEET l0.

4 k iHIm A. BORDT.

ADDING MACHINE. APPLICATION FILE]? 111511.25, 1909.

Patented Dec. 26, 1911.

12 SHEETSfSHEET l1.

Patented Dec. 26, 1911,

12 SHEETS-SHEET 12v uuiiiiiiiiniiiiniiiiiiiiiiiii:iiimiiiiii;ifiiiifiiiiaaiiaiiiiiiiiiiifiiiiiiiiiiiaiaiiiia/ Raw A. BORDT ADDING MACHINE. APPLICATION nun ma. 2;, 190- 7 l wmm SSW Em QM To all-whom it may concern I ADOLF BORDT, OF MANNHEIM, GERMANY.

ADDING-MACHINE.

Specification of Letters Patent.

\ Patented Dec. 26, 1911.

application filed March 25, 1909. Serial No. 485,592.

- Be it knownthat I, ADoLr Bonn'r, a subject of the German Emperor, and resident ofMa-nnheim, Germany, have invented cer-' tain new and useful lmprovementsin and Relating to Adding-Machines, of which the 1' following is a specification.-

- the denominations of the keys operated, the said invention including means whereby the. machine is arranged to print without add- One of the objects of this invention is to provide an adding machine which 1s arranged to add and print in accordance with -ing or to add without printing.

One of the objects of this invention is to provide a system of adding wheels actuating racks normally under the-influence of the springs and adapted, when a selected rack is released for operation to be moved into driving relation with the wheel-of the adding device, to operate the same, when a main operating lever has been actuated.

' An object of the invention is to provide a printing mechanism arranged to print upon an intermittently actuated strip the numbers of'the keys which have been operated, and

in this connection, the invention-includes --means for automatically preventing the printing of zeros in advance of the first numerals to the left of theline printed. v

'lhe-invention has to do with improved devices-for throwing out of operation the adding device and the printing mechanism so right, a machine embodying the main fea-- that either may beoperated, without the other. p

A feature of the invention comprises automatically acting releasing means which may be operated automatically or manually and which is designed to release all of the depressed or actuated keys on the key board or any one of the operated keys of a single row of keys.

The invention also includes an improved automatic tens advancing mechanism for successively advancing the reading disks of" the adding'mechanism after any one of the same has reached a nine position.

The invention also includes other features and details-of constructions which will be more fully described inconnection with the accompanying drawings and which will be more particularly pointed out and ascertainedinand by the appended claims.

H In the drawings :-F1gures 1 and 2 illustrate in side elevation, looking toward the key.

- tures of my invention with all of the parts shown in a normal or starting position. Figs. 3 and 4, together, illustrate a lan View, artly -insection, of the mac ine shown in Fig. 1 with one row of keys and the operating mechanism therefor. Figs. 5 and 6, together, illustrate the machine in side elevation, as disclosed in Figs. 1 and 2, illustrating the parts as they would a pear during the operation of adding an printing.

7 Figs. 7 and 8, together, illustrate a view of the machine similar to the views; shown in Figs. 1 and 2 with parts of the printing mechanism omitted. Figs. 9 and 10, together, illustrate the machine looking from the left hand side thereof. Fig. 11 is a perspective-view of the adding mechanism and tens advancing device detached from the machine, parts being shown in section. Fig. 12 is a plan view of the improved device for preventing the printing of zeros in advance of the first numeral to the left of a line of printing. Fig. 13 is a sectional view thereof.

Like numerals of reference designate similar parts throughout the different figures of the drawings.

As illustrated, the machine is mounted on a base'136 and includes a frame, indicated as a Whole by 1. The forward upper portion of the frame inclines forwardly and downwardly, as indicated at'2, to dispose the keys 3 in a position accessible to the user. The keys 3 are adapted to be arranged in rows across the key board or frame portion 2, but

in order to simplify the drawings, only one.

row of keys is shown in Fig. 3. In the following description the parts necessary for one row of keys will be described and it will be understood that the parts for each rowwill be duplicated for each additional row of keys. The keys 3 extend through and are guided by apertures 4 in the key board 2, and as shown in Fig. 5, each key is provided with a shank extending downwardly from the key board and the central key shank is straight whereas the shanks of the remaining keys are formed so that their lower ends 6 are grouped closely together on oppositeside's of the shank of the central the keys 3. In or er to afford free move mentof the bar 17 rollers 15 andlfi are pro- 20 a of-the bar 24 engages theroller 1 The bar toward the front of the machine and are open at their upper portions to receive pin 11, one of such pins being provided for each i key. When one of the keys is depressed its pin 11 enters an adjacent slot in the bar 17 and the wall of the slot actsas a cam and forces the bar 17 toward the rear of the machine.

A key locking bar 24 is disposed beneath the bar 17 and is shown forked or bifurcated at its upper end at 26 to'cngage on both sides of a roller The lower or front end 24 is-provided with a plurality of recesses 4S spaced apart so as to form therebetween teeth 44. The front faces of the teeth 44 are inclined and act, as cam surfaces for plus 12 mounted on the shanks 6 of the keys 3.

\Vhen one of the keys 3 is depressed its pin 12 acting upon the cam surfaces of the particular tooth 44 serves to move the bar 24 in the direction of the arrow (Fig. 1) until the pin 12 has reached the bottom of the tooth 44. After the pin 12 has reached the bottom of the tooth 44, as shown in Fig. 7, the bar 24 returns by gravity to its initial position and the pin 12 engages the bottom of the tooth 4-1 and serves to lock the depressed tooth in its lowered position. Movement of the bar 24 downwardly or toward,

the front of the machine is limited by the remaining pins 12 of the remaining teeth.

A releasing key, such for instance as indicated at 29, is provided for each row of the main keys for releasing any one key of such row from the locked position shown in Fig. 7. As illustrated in Fig. 7 the key 29 is guided through an opening 30 in the key board 2 and its lower end is bifurcated at 31 to receive a guiding pin 32. The lower or front end 27 of the bar 24 is inclined to provide a cam surface for engagement by a pin 28 on the releasing key 29. It should now be stated that the keys 3 areadapted to be held in their normal or upper position by springs 13 (Fig. 10) only one being shown. When the releasing key 29 is depressed the pin 28 moves the bar 24 in the direction of the arrow in Fig. l a suflicient distance to release the key 12 of the depressed keys, as shown in Fig. 7. The spring 13 of said keys will then raise the same to the position shown in Fig. 1 and the bar 17 will automatically return from the position shown in Fig. 5 to the position shown in F ig; 1 as the pin 11 leaves the slot 14. It will thus be seen that the releasing bar 17 and the locking bar 2-1 are both gravity acting and that they are both actuated in opposition to gravity to perform the functions hercinbefore set forth.

The releasing bar 17 is provided with an extension 19 having a recess 18, as shown in Fig. 1, to prevent engagement with the roller 15 and extending downwardly the said extension carries a pin 20. A slide lock lever 23 is pivotally mounted at 22 and is pro vided with a projection 21 adapted for engagement with the pin 20. The lever 23 is also provided with a latch projection 49 for engaging and looking a slide hereinafter described. Said lever 23 is also provided with a restraining lug 219 which lies immediately above a rod 218 when the lever 23 is in the position shown in Fig. 7 and which lies at one side of the rod 218 when the lever 23 is in the position shown in Fig. 1. It will be clear from the foregoing'that when the bar 17 is moved upwardly, as shown in Fig. 5, the pin 20 will throw the lever 23 in an unlocking position and that when the bar 17 is in the position shown in Fig. 1 the pin 20 will permit the lever to assume a locking position. The lever23 assumes this locking position by gravity, in the construction shown.

Before proceedingwith the description of the remaining parts of the machine reference will be made to devices for controlling the releasing keys 29, which devices are best shown in Fig. 10. A shaft 36 extends across the front of the machine and is provided with an arm 35 for each releasing key 29. Each releasing key 29 is provided with a pin 34 and each pin is provided with asprin g 33. The springs 33 normally tend to return the releasing keys 29to their no1-- mal or upper position. Said springs 33 engage the pins 34 from below and the arms 35 engage the pins 3t from above and serve, when the shaft 36 is rotated to the left, to depress the keys 29. Vhen the shaft 36 is so rotated all of the releasing keys 29 of the entire key board will be depressed so to release the main keys 3 and permit 'theni to return to their normal or upper position by devices hereinbefore described. .\n angular lever 38 is keyed tothc shaft 36 and carries the pin 37 and a pin 42. A dog 40 is pivotally mounted to the angular lever 33 at 39 and is provided with a projection 41 extending bcneath the pin 42 and at its opposite end said dog 40 projects rearwardly beyond the angular lever 38. The means for throwing out of gear the adding mechanism includes a lever 127 having its forward end arranged to engage, on its upward movement, the pin 37 so as to throw the arms 35 out. of engagement with the pins 34, by raising the part 38, thereby necessitating the individual depression of each of the key releasing keys 29 for each row when it is desired to return any of the main keys 3 to their normal positions. This adjustment is made when it is desired to print without adding. When it is desired to print and'add the lever 127 1s disposed in the position shown in Fig. 10 so that the dog 40 will be in the path ofja lever 122. The lever 122 is arranged to be actuated at the completion of adding-operation and I automatically to return the main keys 3 to their normal position. The dog 40, as arv ranged, freely oscillates about the pivot 39 to permit the lever. 22 to assume the'position shown in Fig. 10, from a lower position,

without operating the shaft 36. The mech 'anism and further functions relating to the levers 122 and 127 will be dealt with 'in the further description of the machine.

Returning to the locking .lever 23 and referring to Figs. l-to 8, inclusive, reference will be made to supporting plates which are provided for each rowof keys 3 and parts pertaining thereto. The plates herein shown, support the rollers 15, 16 and 25 andalso the pivot-s 22. As shown in Fig. 1 the extension 19 is apertured to permit the pivots 22 to extend therethrough and also to permit movement of the extension 19. Said plates 10 also support a bar 8 secured "thereto by screws 9, which forms a guide forthelower end 6 of the keys 3.v In the Q. plate 10 a slot 45 is formed to provide a.

caring-for a sliding pivot block 50 and the pivot .50 projects laterally from the plate 10 and the'parts are so arranged that the move:

ment of the pivot 50 will be interceptedby the lower end of any one of the keys which are depressed as clearly shown in Fig. 7. VVh'en' in the position shown in Fig. 1- the pivot block 50 is locked by the lever 23 and is engaged by the latch 49 thereof. A hearing member 47 secured at .46 to the pl ate 10.

is provided for supporting'the pivot block 50 in a to and fro movement. In Fig. 3

. parts shown below the key board including" the plate 10 are for the next adjacent row of keys to the left of the keys 3 herein shown and it will be understood that the keys 3 are, provided with mechanism of a similar nature located beneath the same. The pivot block 50 is shown connected by a link 51 with one of a system of adding wheel actuating racks 52 which is herein shown 'as,

This seghaving the form ofa segment.

vment rack 52 is .mounted' upon an arm 53 j which is loosely disposed. upon a shaft 54 extending across the machine so as to supshown in Fig. 4, and which may be connected with the-arm 53 by a pin 58 thereon.

The springs 60 are arranged to rock the pressed the. lockin pivoted at 55.

segments rearwardl y. It may here be stated that after one of the keys 3 has been deraised and thesprings 60 will rock the rack segments 52 and the latter, acting through the links51 will movethe pivot block 50 inthe slot 45 until suchfmovement is arrested by the lower end 6 of thedepressed keyas shownin- Fig. 7 wl1erein is illustrated a partial movement of the pivotblock 50. The adding mechanism will be brieflyreferred to as including toothed Wheels 144 with which the segment racks 152 are adapted to be thrown into mesh there being a segment rack 52 for 'each row of keys and a toothed wheel 144 for each row of keys. In the present invention the segment racks lever 23 of such row is are normally out of mesh with the wheels of-the adding mechanism and are automat-- icall y thrown into 'Inesh therewith, if the adding mechanism is intended to be used.

The construction and arrangement whereby the segments 52 are thrown into and out of mesh with the wheels 144 includes arms 56 and 57, the arm 56 being on the left hand right hand side thereof. The arms 56 and 57 carry at their free ends the shaft 54 on which the arms 53 are loosely mounted, and at their rear ends, said arms 56' and 57 are A main controlling shaft carries the mainoperating lever 84 for slmu'ltaneouslyactuating various elements and mechanisms of 'the' machine, as here inafter more particularly specified, (Figs. 1 to 8) and, extends across the frame of-the machine. On the left hand side of the machine (Figs. 9 and 10) an arm 75 is rigidly secured to the shaft 74 and carries on its upper end a segment cam' 72 having an upper cam surface70 and a lower cam sur- Atthe ends of said surfaces 70' cam surface. By reason of the fac't' that the arm 75 is rigidly secured to the shaft 74 said arm will always be operated when the main operating lever 84 is operated. A lever 63 (Figs, 3, 4, 9 and 10) is pivotally -1fnou'nted at 62 to the frame of the machine and is provided with a stop pin 67 near the 1 side of the machine and the arm 57 on the pivotal mounting 62. The forward or free end of said lever 63 is connected bya link I61-with the arm'5 7 for'the purpose of lift-- ing the shaft 54 "or permitting the same to lower. An auxiliary'lever 65 is pivoted ,to

The forward endof said auxiliary lever 65 carries a roller 69 adapted to cotipcrate with the continuous cam surfaces 70, 71, 128 and 129. WVhen the adding machine mechanism is not to be operated the roller 69 rides upon the cam surface 71 and this the lever 63' at 64 and s rear end is limited i inits downward movement-by the pin 67.

' into mesh .with the wheels forward position maintains the shaft 54 in its lowermost position so that the segment 52 will be out of mesh with the wheel 141. iVhcn the add ing mechanism is to be operated the roller 69 rides upon the cam surface 70 so as to raisethe shaft 54 andbring the segments 114. \Vhen the main operating lever 81 is in its extreme as shown in Fig. 1, the arm 75 carrying the cam 72 will be advanced to the right of Figs. 9 and 10 a sutlicient distance to bring the transfer cam portion 125) abreast of the roller (5.). The incline of the cam portion 129 will cause the roller 169 to normally ride up on the cam surface 129 and on to the upper face 70. This would take place? upon movement of the arm 75. (Figs. 9 and 10) to the left and this would raise the shaft 54 through links (31 and bring the racks '52 into mesh with one of the toothed gears 144. By reason of the fact that the cam surface 129 is very short and abrupt it will be readily seen that the shaft 5-1 will be lifted to bring the rack 52 into mesh with the wheels 144; almost simultaneously with rearward movement of the rack under the action of-spring 60. It may be stated that when the roller 69 rides upon a transfer cam surface 129 the rear end 66 of the lever (35, will engage the pins 67 andthe pivot (32 will form the center about which the levers 65 and (33 swing in raising the shaft 54 to bring the segments in mesh with the gears 141.

In the preferred construction reliance is not placed upon the cam surface 129 for raising the shaft M to the links (31 and roller (39. although it will appear that the end 66 of the lever 65 will act by gravity to raise the roller (39 a sullicient distance to insure its engagement with the transfer cam 129. but 1 preferably provide a spring 121 for insuring rising movement of the lever (33. t pring 121 is connected at one end with the frame of the machine and at its other end with the. lever 122. hereinbefore described. and which lever is pivotally mounted at 120 upon the frame of the machine. The rear end of the lever 122 engages a roller 11S mounted upon an arm 119 which is keyed to shaft 117. The shaft 117 is mounted in the frame of the machine and extends transversely therethrough. It will be readily seen that when the spring 121 raises the inner end of the lever 122 the latter will act through the roller 11S upon the arm 15? to raise the same and likewise the shaft 54. It may be stated. at this point. that the sp'ring.121 and lever 119 and shaft 11? are for the purpose of performing additional functions which will hereinafter more fully appear.

As will hereinafter appear, it is necessary that the main operating lever should be swung in either one or other of the direc-.

tions in which it is moved to the limit of its travel so that itcannot be moved backwardly, for a portion of its travel and then returned but must always be moved to the limitof its travel or swing. To provide for this operation a link 77 is connected with the arm 75 at 76 and at its opposite end said link is provided with a pivot 79 which slides in a slot 78, formed in a part of the frame work. A pawl 80 preferably provided with a. V-shaped end 81 is pivotally mounted at 79 and loosely rides upon teeth 82 of a bar 83. Referring to Figs. 9 and 10 it will be seen that the lever 8-1 has not reached its full forward movement and therefore the pawl 80 engages the teeth 82 and would prevent movement of the lever 81 to the left of said figure. When the lever 81- has reached its full forward movement the pawl 80 will have passed beyond the extreme right tooth 82 and will hang vertically and idly from the pivot 79. This will admit of the lever 84 being swung to the left or rearwardly, with regard to said tigure. The same operation follows and it will 84 is swung be clear that when the lever rearwardly it must be swung to its full limit of travel before the og 80 is released from the teeth 82. Now vhen the lever 84 has swung to its extreme rearward limit of movement.- and the roller (39 is traveling on the surface 70, or upper surface then the end of the cam will pass beneath the roller 13$) and the latter will be permitted to drop below the end of the surface and will ride. downwardly on the transfer cam surface 128 on to the lower surface 71. The action on the other end of the cam 72, with respect to the cam 12$), has already been described and one of the principal functions of the pawl 80 is to insure the full movement of the lever 81 so as to effect transfer of the roller (3!) from the upper cam surface .70 to the lower cam surface 71 or vice versa.

It has been stated that the rack segments are moved rearwardly by the springs (30 and now the means whereby the return movement of the rack segments 52 against the action of the springs (30 is effected.

On theshaft 71 is rigidly mounted an arm 87 which is connected at 86 with a link SE) having a slot 88.. The slotted link is connected with a pin 90 on the arm 53 of the segment By reference'to Figs. 1 and 2 it will be seen that the segments 52 cannot be moved rearwardly under the action of the-springs [30 until the lever 84 has been moved rearwardly. The end of tl'ieslotted portion 88' is in engagement with the pin 90. It may be stated that after the locking lever 23 has released the slide block 50 it is not desirable to have the segment 53 actuated by the springs (50 until it has been raised into mesh 'ith one of the wheels 14.4. Now when the parts are in the position illustrated in Figs. 1 and 2 the roller 69 will be in a position to ride up on the transfer cam surface 129 and when the lever '84 is moved rearwardly the cam 72 is likewise moved rearwardly so that the roller rides upon the surface 70 and lifts the seg ments 52 into mesh with a wheel 144. The

segment 52 then travels .rearwardly until the slide block 50 engages the shank 6 of 'the particular key 3 which has been deends, of the slot will engage the pin 90 and likewise. return the segment 52 to its forward position so that the slide block 50 will be locked by the lever 23. Owing to the fact that the cam 72 makes a complete movement to the rear, together with the lever 84, the roller 69 will always ride oil from the ends 70 and pass to the lower cam surface 71 at each rear movement of the lever 84. thereby preventing'the segment 52 from disturbing1 the position of the adding wheels which as been effected during the rearward movement of the segment 52, while said segs ment is undergoing its forward movement. It will thus be apparent that the segment 52.is thrown into mesh with one of the adding wheels 144 at each rearward movement of the segment (when it is desired to operate the adding mechanism) and that each forward movement of the segment 52, and at the beginning thereof said segment is thrown out of mesh with the wheels 144. At this point it may be well to describe how the adding mechanism is thrown out of gear when desired.

Referring to Figs. 9 and 10'it will be seen that the auxiliary lever carries a pin 68 at' its forward end. The pin 68 lies in the pathof the rear end of the lever 127, hereinbefore referred to, and which is pivoted at 123 to the frame of the machine. The lever 127 is pivotally connected at 125 with a throw-out key 126 and is normally held in the position shown in Fig. 10 by spring 124.. W'hen the key 126 is depressed the rear end of the lever 127 engages the pin 68 andforces and holds the same downwardly, raising the end 66 of th lever 65, so as to prevent the roller 69 fro engaging the transfer cam 129 and riding on to the upper surface 70 ofthe cam 72. By means of this adjustment the shaft 54 is not elevated during the rearward movement of the lever 84 and therefore the segments 52 are not raised into mesh with the gears 144 and the adding mechanism is not operated. The segments 52 merely move idly under the action of springs 60 to the rearmost position in accordance with the keys 3 depressed and are idly returned when the lever 84 -is moved to its forward position by the arm 87 and the link 89. As has been hereinbefore set 4 forth, the depression of the key 126 raises the forward end of the lever 127 into errgagement with the pin 37 and thereby r0- tates the shaft 36 so as to raise all of the arms 35 out of engagement with the pins f 34. In this adjustment the keys of each row must be released independently by manually operating the release key 29 of the row from which keys are to be released.

The purpose of this arrangement will more fully appear during the description. of theprmting mechanism but may be briefly stated as follows:When printing numbers it is frequently desired to retain a number of keys in a depressed position for printing a new line of figuresbecaus'e the same fig} ures are to be repeated. It will thus be seen that the automatic release of all of the keys 3 at the end of each printing operation would needlessly require the operator to again depress the number of which 7 I he wished to repeat. If it was desired to print 1222 and if it were next desired to print 1223 the operator would not desire A to change the hundreds 2 or the thousands 1 but would merely want to repeat 95,

them with the unit 3. In the adjustment hereinbefore described this can be done without again depressing the keys desig nating the numbers which it was desired to} I For the sake of clearness it may be well to also state that each complete opprint.

eration of the lever 84, irrespective as to whether the adding mechanism or the pr1nting mechanism are separately thrown out of gear or both. used, the lever 122 at its for ward end moves upwardly and then downwardly. Now when the adding mechanism is thrown out by depressingthe key 126 the dog 40 elevated so that the up and down movement of the forward end of the. lever 122 will not in any wayvafi'ect the adjustment resulting from depression of [the key 126.

The adding mechanism and the tens car-d I rying forward device will next be described in detail and reference will 2, 4 and 11.

- A shaft 114 is mounted in the frame 1 and extends transversely thereof and carries toothed wheels 104 and reading disks 147, for each row of keys. -On the periphf cry-of the reading disks 147, numerals 0 to 9 appear and the reading disks 147 and toothed wheel-104 for each row ofkeys are connected together to rotate in unison. A flat spring 149 engages the, teeth of the wheels 144 to prevent movement thereof in either direction, accidentally after such wheel. has been adjusted by a segment 52' to the desired posit-ion. Each wheel 144 has ten teeth and one/of the teeth 145, is.

be made to of gravity.

11. This mutilated tooth 145 should appear opposite the numeral 9 on the disk 117. Each reading disk 14:7 is provlded with a pin 14S projecting toward the next adjacent toothed wheel 11%, and which moves with the disk 117 in the direction of the arrow, as shown in Fig. 11. Said pin -17 is arranged for engagement with an enlargement 153 of an arm 51, and beneath the same, to raise the arm 51 while the pm 118 is passing beneath the enlargement. or cam surface 153. Immediately after the pin 118 has reached the right hand end of the cam surface 153 the arm 151 is permitted to descend in the position shown in Fig. 11. The arm 151 is mounted upon a. sleeve 152 carried by shaft 150, which shaft is mounted in the frame of the machine and extends transversely thereof. The sleeve 152 carries a cam projection 155 adapted for engagement with a pin 156 to lim t movement of the sleeve 152 and arm 151 in a contra-clockwise position, under the action The cam projection 155 engages, or is adapted for engagement with. one end 160 of an idler trip 161 mounted upon a pivot 158. The pivot 158 is carried by the member 157 which will be presently described. The trip 161 is provided with a sleeve 162 which is engaged by a spring 164- mounted upon a sleeve 163 (Fig. 11) to retain the idler trip 161 in its adjusted position and frictionally hold it in such position. The pivot 150 is carried by an oscillating member 157 mounted on the sleeve 163 which latter is mounted on .the shaft 150.

The oscillating member 157 carries a ten advancing element or pawl 166 which is pivotally mounted on the part 157 at 165. A spring 167 attached to a shaft 168, mounted in the frame 1 of the machine. is also connected with the member 157 and normally holds it in the retracted position shown in Fig. 11. The forward end of the ten advancing element 166 is notched for engagement with one of the teeth of the wheel 144: and the rear end of said elements extends beneath the shaft or rod 168. By reason of the fact that the pivot 165 is at one side of a vertical line intersecting the center of the shaft 150, and in view of the fact that the rear end of the element 166 is held downwardly by the shaft 168, it will be apparent that when the member 157 is advanced forwardly, or in a contra-clockwise direction, the forward end of the element 166 will not only have a forward but an upward move-' ment imparted thereto for the purpose of turning the toothed wheel 144 the distance of one tooth. on shaft 151, which is mounted in the frame of the machine and extends transversely thereof, is a cam 169 having acting cam surfaces or shoulders 17 0 and 171 cut away at 146. as clearly shown in Fig. I between which is a relatively reduced concentric surface and a relatively increased concentric surface, the latter verging at the outer ends of said shoulders 170 and 171 (Fig. 11). \Vhen one of the reading disks 147 is to be advanced one tooth to carry forward the tens the pin 148 will engage the bottom of the enlargement 153 and raise the arm 1.54 and thereby causing the projecting cam portion 155 to swing the end 160 of the trip 161 into the path of the working shoulder 170 of the cam 169. Now the end 160 will ride upon the enlarged concentric surface of the cam 169 during rotation thereof in this direction of the arrow, Fig. 11. This will shift the member 157 forwardly toward the wheel 144 against the action of spring 167 and cause a forward and an upward movement of the element 166thereby engaging the same with a tooth of the wheel 144 and rotating the wheel a distance equal to. one tooth. Such forward movement of the element 157 it will be understood is really an oscillatory movement about the shaft 150 at the center. The cam 169, during this operation, is arranged to rotate in the direction of the arrow for approximately three-quarters or seven-eighths of a revolution. After this partialoperation is completed the cam 169 is reversed so that the reduced portion will be adjacent the end 160 thereby permitting the spring 167 to retract the member 157 and also the. element 166. The reverse rotation, or that rotation opposite to the direction indicated by the arrow, of the cam 169 will be sutlicient to bring the working surface 171 into engagement with the end 160 of the trip 161 so as to return it to the full line position shown in'Fig. 11, after the spring 167 has returned theparts to the position shown in Fig. 11 or Fig. 2. \Vhen the part 160 has been returned to the full line position shown in Fig, 11 it acts upon the cam projection 155 and also returns the arm 154 in such a position that the enlargement or cam 153 will be in the path of the pin 148 during the next ten advancement.

The manner in which the shaft 151 is actuated to give the reverse rotation to the cam 169, and also other mechanism in connection, with these parts will now be do scribed in detail.

The shaft 117 carries an arm 94, which is rigidly secured to said shaft, and which is provided at its upper end with a se ment rack 95 adapted to and arranged to always in mesh with a pinion 172 mounted-on shaft 151.- The 'spring'1'21, connected with lever 122, holds the latter inconnection with roller 11S carried by arm 119. which latter is rigidly mounted on shaft 117, and therefore the spring 121 normally holds the arm 94' against an abutment 96 and serves to always yieldingly return said arm 94 to the normx-I or starting position shown in Fig. 2. A

latch hook 91 is pivotally secured to arm 87 which is rigidly mounted on shaft 74 and the hook has a latched shoulder 92 adapted for engagement with a pin 93 on the arm 94.

- forwardly beyond the position shown in Fig.

8. It will'thus be seen that in starting to act the arm 94 will be in the normal starting position against the abutment 96 and when the main operating lever 94 has reached approximately the rearward limit of-its movement the latched end of the hook 91 will engage the pin 93 so that upon the return or forward movement of the lever 84 the arm 94 will be moved forwardly. Now on the forward movement of the arm 94 the pinion 17 2 will be turned in a clock-wise direction as indicated by the arrow in Fig. 11 on the cam 169. This will cause the part 170 to engage the end 160 and operate the ten advancing mechanism. As hereinbefore stated the wheel 172 and the cam 169 will be rotated in a clockwise direction slightly less than a complete rev'olution by the forward movement of the arm 94. Now it has been stated that after the ten advancing mechanism has been operated it is necessary to throw the trip 161 into a non-acting positionout of the path of the part 17 0. This is accomplished by reason of the fact that when the lever 84 in its return. movement approaches the forward limit of its swin the latch 91 will be disengaged from the pin 93 by the pin .93". This will place the arm 94 under action of the spring 121 and the latter will return. the arm 94 to the abutment 96'. This return movement of the arm 94 will rotate the shaft 151 in a contra-clockwise direction, so that the acting surface 171 of the cam 169 will throw the trip 161 into the full line position shown in Fig.,11 so that it will be out of an acting position with respect to the cam 169.

'of the machine.

After the completion of each adding operation it is necessary'to return the reading disks 147 to a zero osition and therefore means are provided or returning said disk to a zero position and preferably said means is normally out of engagement with the add-.

ing mechanism. As shown, parts 108 and 111 carry a shaft 110 (Figs. 7 and 3) which shaft extends throughout the width The shaft 110 carries a plurality of toothed Wheels 113 arranged so that one'wheel on shaft 110 will of said part about the pivot 107. The part 108 is provided with a cam surface 109" adaptedto be engaged by the end 106 of a lever 105. The lever 105 is pivoted at 102 in the frame of the machine and has an extension 104 provided with a handle 103 and also has a cam surface 101. hen the lever 1 04 is swung about its pivot to bring the end' 106 in engagement with the cam surface 109 the part 108 is swung rearwardly to bring 76" the wheels 113 to mesh with the wheels 144. 3

After the wheels 113 have been brought into' mesh with the wheels 144 and the reading disks have been returned to a zero position then the parts which carry the shaft 110 will return 'to the position shown in Fig. 7 by gravity, after the lever 104 has been re,-

turned to the full line position shown. The

cam surface 101 is adapted fo'rengagement' with a cam extension 100 formed on a lever 99. The lever 99 is pivoted at 98 to the frame work 1 of the machine and is con nected by a link 97 with the arm 94. Now (referring to Figs. 1, 2, 5, 6, 7 and 8) it will sition the pins 148 will engage the cams 153 (Fig. 11) and throw the trip .161 into the path of the actuating surface 170 of the cam 169. If, in the following operation of addition, the tens carrying or advancing device be actuated upon the first movement of the wheels 14 4, this would result in an inaccurate addition. Now by reason of the connection hereinbefore described the arm 94 rotates the cam 169 to bring the reduced surface thereof adjacent the trip 160 while the arm 94 is swung forwardly by the link 97.' After the reading disks have been set to a zero position and thearm 104 has been returned to the position shown in Fig. 7 then the trip 160 will be in the path of the actuating surface of the cam 169 ready to be tripped thereby. However when the arm 94 has been released by disengagement of the cams 101 and 100 and when the arm 94 is returned by'the spring 121 to the abutment 96 it will rotatethe cam 169 in-a contra-clockwise directimyand cause the actuating surface 171 to engage the end 160 and throw it from .the dotted line position in Fig. 11 to the full line position in Fig. 11. Now all of the parts are in their normal or starting i -position and the next operation of addition. can be initiated and accuratelycarried out.

Reference will next be made to the printing mechanism and to the arrangement whereby it may be either operated or thrown out of operation.

Asavill be seen by reference to Fig. 4 the printing mechanism is located outside of and to the rightof the frame of the machine. Said mechanism includes printing wheels 190 on the periphery of which the printing characters are disposed, and toothed pinions 207, one for each printing wheel. The pinions 207 and printing wheels 190 are mounted upon a common shaft 191 and this shaft is carried in a frame 192. The frame 192 is supported upon an arm 193 which is pivotally mounted at 194 to the frame of the machine (Figs. 2 and 6). For each pinion 207 there is an operating bar 187 provided with teeth 18S adapted to mesh with the pinions 207. The operating bars are for the purpose of rotating the printing wheels to bring the proper character into a printing position prior to the actuating ot the printing mechanism to etfect the impression. The opposite or rear end of the bars 187 are pivotally connected at 186 with arms 185 formed on sleeve 182. The shafts 1S1 extend through said sleeve and transversely across the machine and find bearings at the right of the machine in a bar 184 and in the machine frame. as clearly shown in Fig. 4. The sleeves 182 extend through the machine as shown in Fig. ti and each of the sleeves carries an arm 180 which are pivotally con nected to connecting bars 179. Thereis a connecting bar 179 an arm 180 and an arm 195 and an operating bar 187 for each row of keys. For the row of keys shown the extreme right hand bar 179 is connected with the pivot or sliding block 50, as shown in Figs. 1 and \Vhcn the sliding block 50 is moved in the slot 4-5 under the action of a spring (30 such movement is transferred from the bar 179 to the corresponding operating bar 187. and the extent of movement of the sliding block .30 is transmitted to the particular printing wheel so as to rotate the same a distance suiiicicnt to bring the denomination on the printing, wheel corresponding to the denomination on the key depressed into a printing position. In Fig. 3 the key bearing the numeral 5 is depressed and therefore the bar 188 will rotate the printing wheel to' bring the numeral,5 thereon into a printing position. in the machine according to the present construction the printing wheels are always actuated even when the printing mechanism is not adjusted to make impression and every time that the sliding block 50 is brought back to a zero position and locked by the lever 23 the print ing wheels are rotated by the racks 188 back to a zero position.

The means for swinging the printing mechanism into and out of an impression position to transfer the adjustment of the printing mechanism to the tape or ribbon. hereinafter described, will now be described in detail.

The printing wheels, carried by the arm 193, are swung downwardly into an impression position at each time the main operating lever 81 is swung rearwardly. As shown a lever 178 is mounted upon the shaft 74 and is provided with an engaging portion 177. The lever 17S engages a pin 195 projecting inwardly from the arm 1.93 to transmit downward movement to the arm or lever 193 for the purpose of making an impression. A spring 196 engages the lower side of the pin 195 to normally hold the lever 193 in an upper position and to return the lever 193 from a downward to an upper position. A lever 175 is pivoted upon the main operating lever 84- at 173 and is provided with a handle 17-1 and a rear end 176 adapted for contact with the engaging portion 177. \Vhcn the main operating lever 81 swung r arvvardly and the lever 175 is in the position shown in Fig. '1 the end 176 will engage the portion 177 and depress the rear end of the lever 178 against the pin 195 and thereby depress the printing mechanism from the position shown in Fig. 1 into an impression position. Fig. 5 shows a lever 175 in engagement with the portion 177. When it is desired to throw the printing mechanism out of operation the lever 175 is moved away from its stop pin, adjacent the pivot 173, so that. the end 176 will not on- ,gage the portion 177 and this will permit -the lcvcr R4. to be swung rearwardly without depressing the printing mechanism.

An inking pad is mounted upon a support 207 and is held in engagement with the printing wheels 190 when the same are in the position shown in Fig. :3 and is withdrawn therefrom during downward movement of the printing wheels so as to permit. of etlecting' an impression thcrelrv. As shown the support 207 is provided with a sleeve Qtlti mounted upon a pivot pin 203. The pin 205 is mounted on an arm 199 which latter is pivotally mounted at 290 upon the Frame of the machine. The arm 199 is normally held in the position shown in Fig. 1 by a spring 293 which bears with its free end upon a pin .201 located at one side. of the pivot 200. The support 207 is held in fixed relation with respect to the arm 199 by a pin 20% which projects below an extension 209 of the support 297, as clearly shown in Fig. 4. lt is obvious that the support 207 and the arm 199 swing as one piece about the pivot 200. However it will be. understood that the arm 199, can swing freely backward or downward after the support 207 has reached or engaged an abutment. Movement of the arm 199 under action of spring 203 against pin 204 is limited in one direction by an abutment .202 (Figs. 2 and 8) mounted on the machine frame. In the construction shown the support 207 for the inking pad is moved out of engage- 

